The dual sensitive fuse is an important accessory for the overcurrent protection of oil-immersed transformers in the power distribution system. It is used in conjunction with plug-in fuses and backup fuses to form a "dual fuse protection" scheme. The dual sensitive fuse protects the low-voltage side of the transformer from faults or overloads in terms of current and temperature, and can prevent the transformer from rising humidity due to overload or excessive ambient temperature. The dual-sensitivity fuse is installed in the plug-in fuse for quick installation, convenient replacement and reliable operation.

The plug-in fuse bracket is mainly used as an important accessory for box-type transformer over-current protection. The matching fuse is installed inside to protect the transformer from many aspects, such as current size and oil temperature. The plug-in fuse has a simple installation method, reliable operation and convenient fuse replacement. It is widely used to protect the high-voltage side of transformers.

Plug-in fuse fuse cartridges can choose to install different types of fuses according to the protection conditions. Such as current-type fuses, dual-sensitive fuses, dual-factor fuses, and high-current overload fuses.

The back-up fuse is used in American box substation and is the main component to provide overcurrent protection for American box substation.